Wireless Current Sensor User Manual - Bkp
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1. PC Settings Range Test Terminal Modem Configuration Modem Parameter and Firmware Parameter Ven j Profile Versions Read Write Restore Clear Screen Save Download a Show Defaults _ Load IF Always Update Firmware versions Modem XBEE Function Set _ Version k8240M x XBEE DIGIMESH 2 4 X 2062 DN A 53 1 0 Settings 2 00 AD0 0100 Configuration EEE 0 01 4D1 0101 Configuration B 0 02 AD2 D102 Configuration 0 03 AD3 D103 Configuration B 0 D4 AD4 D104 Configuration B 1 05 4D5 DI05 4ss00 Configuration 0 08 DIO8 SLEEP_AG Configuration 1 09 DIO9 ON_SLEEP Configuration W 1 P0 DIO10 ASSI PWMO Configuration BH pt DI011 PWM1 Configuration B 0 P2 01012 Configuration BR 0 MO PWMO duty cycle fa 0 M1 PWM duty cycle BR 0 LT Associate LED Blink Time RB 28 AP ASSI PWM Timer BH FFF PR Pull up Resistor Enable E 1 0 Sampling Sy AT Command Options Ba ACT AT Caramand Made Time it Configure options for the ADO DIOO line of the module Options include Enabling commissioning button functionality Analog to Digital converter Digital Input and Output COM4 96008 N 1 FLOW NONE XB24 DM Ver8062 Figure 4 7 Configure DIOO to DIOS pins as input or output to match your I O board setup DIO8 to DIO12 are not used and should be left as 0 Disabled The PR field defaults to Ox1 FFF or binary 1 1111 1111 1111 Ea2. 0 40 API Options Sy 1 0 Settings BR 1 00 ADO DID0 Configuration RB 0 01 AD1 D101 Configuration BR 0 02 AD2 D102 Configuration B 0 03 AD3 D103 Configuration BR 0 04 AD4 DI04 Configuration D 1 05 AD5 DID5 Assoc Configuration B 0 08 DIOB SLEEP_RQ Configuration B 1 09 DIOS ON_SLEEP Configuration B F0 01010 R551 Pw M0 Configuration Bi pn DD ADAM Continuation 7 Packet mode API formats frames into packets from the RF link to the serial port It expects serial port packets to be formatted and transmits as a packet over the FF link v COM4 S96008 N 1 FLOW NONE XB24 DM Ver 8062 Figure 4 6 One option that needs setting here is the API enable API mode must be enabled if the XBee module on the I O board is going to be able to transmit input pin information and set the outputs API mode 2 is used by the Arduino XBee library if you plan to use an Arduino type board as your base station Also note that the Digital I O pins DIO6 and DIO7 are configured here The reason for that is they can also be used as serial port flow control pins If you are using DIO6 and DIO7 on your module then you should configure them here as Inputs or Outputs Rev 1 00 11 8 19 2013 Wireless Current Sensor User Manual 4 5 Configuring I O Settings Here is where you configure the I O pins for DIOO to DIOS see prior section for DIO6 amp DIO7 COM4 X CTU Modem Parameter Profile Remote Configuration Versions
3. 6 PCB Mechanical ofp os CWWCLTSI a 82ETd bi PIC G2T 0 CH Zei A N 8 H La Se g A8 Quy S 2np044 2414574194 TP2IUEUSTSN Z10Z 01 80 OTOZ N d Note Dimensions are in mils 8 19 2013 15 Rev 1 00 Wireless Current Sensor User Manual 7 Appendix A Specifications Power Requirements e 8V 400mA minimum e 32V maximum 100mA Do not exceed 32V input The Input DC voltage after the bridge rectifier can be monitored at TP1 see Figure 2 1 on the board Environmental e 30 to 65 C Operating e 40 to 85 C Storage e 5 to 95 Relative Humidity non Condensing Rev 1 00 16 8 19 2013 Wireless Current Sensor User Manual 8 Appendix B Warranty Berkshire Products Inc warrants to the original consumer or other end user purchaser that this product is free from defects in materials or workmanship for a period of one 1 year from the date of purchase During the warranty period and upon proof of purchase the product will be repaired or replaced with the same or functionally equivalent model at our option without charge for either parts or labor This warranty does not apply to defects due directly or indirectly to misuse abuse negligence accident repairs or alterations made by the customer or another party UNDER NO CIRCUMSTANCES WILL BERKSHIRE PRODUCTS INC BE LIABLE IN ANY WAY TO ANY PURCHASER FOR DAMAGES LOST REVENUE LOST WAGES OR ANY OTHER INCIDENT
4. DIOS Configuration D BE FT Flow Control Threshold Br IMAP API Enshla Ge Set read the lower 32 bits of the 64 bit destination extended address Ox000000000000FFFF is the broadcast address RANGE 0 0XFFFFFFFF COM4 Figure 4 5 In this example we are programming a module for an I O board that will talk to a host module base station at regular intervals So in this case we set the High order 4 Bytes to the standard XBee address of 0x0013A200 and the lower 4 bytes to the address of our base station module 0x40883039 Once this is set the module will know what address to send API packets to when an input changes or when a sample must be sent Rev 1 00 10 8 19 2013 Wireless Current Sensor User Manual 4 4 Configuring the Serial Interfacing There are a few options to set here COM4 X CTU Modem Parameter Profile Remote Configuration Versions PC Settings Range Test Terminal Modem Configuration Modem Parameter and Firmware Parameter View Profile Versions Read w Gears s e e Restore lear Screen ave Download new F Always Update Firmware Show Defaults Load versions Modem XBEE Function Set _ Version _ KB24 DM v XBEE DIGIMESH 2 4 8062 X 3 Serial Interfacing a B 3 8D Baud Rate BD up Parity BR 3 F0 Packetization Timeout RB 1 07 DIO Configuration 0 06 DIOS Configuration BR BE FT Flow Control Threshold B 2 4P Ap Enable PORT
5. AL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THIS PRODUCT Berkshire Products Inc reserves the right to make modifications in this product without prior notification Rev 1 00 17 8 19 2013
6. G DigiMesh version with Digi s X CTU software which is free and available from Digi International www digi com To program the radios we use the UARTSBee V4 device which provides power and a USB UART connection to the PC They are available from Amazon www amazon com and other sources and look similar to this picture Figure 4 1 These devices are also useful for connecting to your PC to use as the base station to talk back and forth with the remote I O module s XBee radio Note Be aware that this board may not be able to supply enough power for an XBee Pro type radio if you plug it into a USB hub Note When the device is first plugged in you may get an alert from your PC that it needs to install drivers for a new device The UARTSBee uses the FTDI chip for USB to Serial conversion and most PCs have these drivers pre installed If yours doesn t go to www ftdi chip com to get the latest ones for your PC and OS Rev 1 00 7 8 19 2013 Wireless Current Sensor User Manual 4 1 Starting X CTU When you start X CTU you should see a screen like the following About PC Settings Range Test Terminal Modem Configuration Com Port Setup Select Com Port Communications Port COM2 Baud 9600 USB Serial Port COM4 Flow Control NONE e Data Bits Parity Stop Bits Test Query Host Setup User Com Ports Network Interface API Reponse Timeout I Enable API Ti t 1000 ru 3 imeoul AT comma
7. Wireless Current Sensor User Manual PN 2010 Berkshire Products Inc Phone 770 271 0088 http www bkp store com Rev 1 00 Copyright 2013 Wireless Current Sensor User Manual Table of Contents UN ee re gcc acl tae ach Gide Sua E RE sees oe he Neh aha Ah aS Gt 2 1 1 XB compatibility eren et e A a tee N 2 2 Making Connections and Jumper Settings 3 2 1 AD DC Power Input Jumper J6 or J A 3 D2 AC DC Current Sensing J1 J3 amp E 4 2 3 Current Sense Terminal KE 4 2 4 Unstuffed Headers J2 J2 SIN 4 3 Theory of Operation and Configuration ss 5 3 1 Input Sense ICU EE 5 3 27 gt Condit onin e TE 5 3 3 Comparator SECTOR nantais egene 5 34 Circuit EE 6 3 5 PAY TEX AMI le EAE EE Ee 6 4 gt Conheunne the XBee Kache 7 4 1 KIC NBT 8 42 Configuring th Networking i c cicic ssscascgsccesasscesshansendcsvenaddgonssessetecenectonscoduveene 9 4 3 Confis rine HERE eer enna as E acne ee E 10 4 4 Configuring Ee ENN EE 11 4 5 Configuring OS Gti 2s sisi soient 12 4 6 Configuring I O Sampling sarl EENS 13 Die coch e Tree 14 6 PCB Mechanivall eegen eee ee a 15 7 Appendix A Sp cifications 3 5scccccesicavassscazsacejescavsossaeesseesanaasesbaaev aadedeus iiia 16 e Appendix Be Wartanty aee EE enee 17 Rev 1 00 i 8 19 2013 Wireless Current Sensor User Manual The latest versions of manuals sample code and other tools can be found on our site at http bkp store com If you have any questions co
8. ch bit set to one 1 defines a pull up resistor on input pins DIO12 to DIOO The default values should be fine unless you are using the input pins for analog inputs In that case the lower six bits should be zero for any pin that is an analog input Rev 1 00 12 8 19 2013 Wireless Current Sensor User Manual 4 6 Configuring I O Sampling This is the last area of X CTU covered here COM4 X CTU Modem Parameter Profile Remote Configuration Versions PC Settings Range Test Terminal Modem Configuration Modem Parameter and Firmware Parameter View j Profile Versions Read White Restore Clear Screen Save Sege Ir Always Update Firmware Show Defaults Load versions Modem XBEE Function Set Version XB24DM XBEE DIGIMESH 2 4 x s062 41 0 Sampling A RB 0 IC DIO Change Detect DR mp Sample Rate R D IF Sample From Sleep Rate Sy AT Command Options BR 64 CT AT Command Mode Timeout RB 3E8 GT Guard Times RB 28 CC Command Sequence Character Diagnostic Commands D 0 DB Last Packet Assi 8062 VR Firmware Version D 1744 HV Hardware Version D 99 ER Receive Error Count D 0 GD Receive Good Count D 0 TR Delivery Failure Count D 0 UA Unicasts Attempted Count D 0 EA Number of MAC ACK timeouts D 0 BC Number of bytes transmitted D F9 SQ Missed Sleep Synch Count D EAEN CE Confionration Pade Set read sample rate When set this parameter causes the mode
9. d versions Modem XBEE Function Set Version K8240M XBEE DIGIMESH 24 x e2 3 Networking A BR FFF ID Modem VID Operating Channel Mac Rletries Multi Transmit Broadcast Radius Mesh Retries Network Hops Network Delay Slots Coordinator Enable essing 134200 SH Serial Number High 40870885 SL Serial Number Low 0 DH Destination Address High FFFF DL Destination Address Low IHN Node Identifier 82 NT Node Discovery Backoff BD 0 NO Node Discovery Options E 50000 DD Device Type Identifier Fa Gamrihi Read parameters OK E a CH ka U a a a a a a Ad a a a a a a COM4 96008 N 1 FLOW NONE XB24 DM Ver 8062 Figure 4 4 Under the Networking section there are options that you can change Note that different types of modules will have different options The ones shown here are for DigiMesh For this module type the only two changes that we will talk about are the VID and the Channel e Modem VID This is a HEX number that sets the PAN Personal Area Network ID for the network Valid range is 0 OxFFFF All the XBees on your network should use the same VID e Operating Channel This sets the operating channel number Uses 802 15 4 channel numbers Note two things here 1 XBee modules have more channels available than XBee Pro modules so be sure to select an operating channel that both types can use if you have mixed modules on
10. e top pin is labeled S and the other is S These are the required polarity connections when you are using DC sensing For AC connections it does not matter Note Do not try to measure currents higher that 5 Amps or voltages greater than 32 Volts The board is not designed for operation above these levels 2 4 Unstuffed Headers J2 J2 amp J8 These headers are not stuffed on the board and leave you the option of stuffing headers or receptacles on 0 100 centers J2 and J7 are connected one to one with the XBee pins and J8 gives access to 5V 3 3V and GND See the schematic diagram for more information Rev 1 00 4 8 19 2013 Wireless Current Sensor User Manual 3 Theory of Operation and Configuration Before we start we need to make one thing clear this is not a precision scientific instrument It is designed to allow you to measure sense currents and report the results wirelessly 3 1 Input Sense Circuit The heart of input section of the circuit is the current sense IC made by Allegro Part Number ACS712 When the current thru the chip is zero amps the output on pin 7 is a nominal 2 5V As the current swings plus or minus the output voltage changes at a rate of 185mV per Amp Since this is a5 Amp sensor the output can vary a total of 925mV 0 925V 3 2 Conditioning circuit Two OP Amps U1 amp U7 make up the AC DC conditioning circuit When the jumpers JL J3 amp J4 are in the AC position the output of U1A
11. is set to be about 1 650V at zero current Its amplification is set so that full scale plus minus current 5A will range from 0 135V to 3 185V When the jumpers J1 J3 amp J4 are in the DC position the output of UIA is set to be about 0 050V at zero current and 3 245V at the maximum current of 5A The output of U1A is connected to an analog XBee pin so you can set the XBee for timed sample rate reporting OP Amp U4B is used to buffer the output of U1A for the comparator section 3 3 Comparator section The output of U4B drives the two comparators in U2 through Shottky isolation diodes in D1 Comparator U2A is set to go high 3 3V if the AC current positive swing or DC current exceeds a certain level Trim pot R15 sets the current level for the trigger point and trim pot R18 sets the decay time along with R19 and C8 Comparator U2B is set to go high 3 3V if the AC current negative swing or DC current low exceeds a certain level Trim pot R7 sets the current level for the trigger and trim pot R3 sets the decay time along with R5 and CS Rev 1 00 5 8 19 2013 Wireless Current Sensor User Manual 3 4 Circuit Setup On the XBee radio you need to program the digital inputs DIO1 and or DIO2 to Change Detect mode to report the comparator changes as required You can disable the low side comparator U2B via XBee programming or by using R7 to set the voltage at pin 6 of U2B to 0 0V You should set the decay trim pots R3 and R18 s
12. m to sample all enabled DIO land ADC at a speoified interval RANGE O OXFFFF 1 MS vv COM4 S00 6 N 1 FLOW NONE XB24 DM Ver8062 Figure 4 8 The DIO Change Detect is a bit field and should be set to a hex value Any bit that is set will cause the XBee to send a packet when the I O line for that bit changes goes low to high or high to low and the pin is set as an input For example if you set this field to 0x2C binary 0100 1100 then it would send a data packet if DIO6 DIO3 or DIO2 changes state on its input The Sample Rate tells the XBee module to send a data packet at regular intervals to report the status of digital and analog input pins The number is in milliseconds so a reasonable minimum value is about 0x80 or 128mS If an edge change is programmed and it occurs between samples then a packet will be sent then as well The maximum value for this field is OXFFFF or 65 353mS A value of zero stops the samples Rev 1 00 13 8 19 2013 WOO ar CYT MAMA LUDO POULT AMMA SE LEI VO Baus Quy SJONPO AYSHA vas SZI Mm On GC HN OVAM SZIV HIN OVAM SZV HIN EA Ger S080 Pepa 4 Cal s080 PES 4 VAE E E z sutg uo sxedung osues quexn oa Z T SUTY uo szedum su zu z no OW we EP Ep iagram Wireless Current Sensor User Manual ic D KZ ater anoo anot E END S080 Peng 4 ONE H 5 Schemat 8 19 2013 14 Rev 1 00 Wireless Current Sensor User Manual
13. nd Setup ASCII Hex Command Character CC Guard Time Before BT 1000 Modem Flash Update I No baud change Figure 4 2 In this example the USB Serial was on COM4 The baud rate should be 9600 to start with since that is how the XBees are shipped from Digi Click the Test Query button to see if the XBee is active If so you should get a window like this Com test Query Modem Communication with modem DE Modem type XB24 Modem firmware version 8062 Serial Number 13420040870885 Retry OK Figure 4 3 Is this case the test was OK It found an XB24 or a 2 4G DigiMesh If it had been the higher power Pro it would have been XBP24 The firmware version is shown along with its serial number IEEE Address which is HEX 0013A200 40870B85 The address is always 8 Bytes 64 bits and leading zeros are not shown Most Digi XBees start with 0013A200 It is also shown on the label on the bottom of the module Rev 1 00 8 8 19 2013 Wireless Current Sensor User Manual 4 2 Configuring the Networking The next step is to click the Modem Configuration tab and then press the Read button to get a screen like the following COM4 X CTU Modem Parameter Profile Remote Configuration Versions PC Settings Range Test Terminal Modem Configuration Modem Parameter and Firmware Parameter View Profile Versions Write Restore Clear Screen Save Download new Always Update Firmware Show Defaults Loa
14. nt placement ES es uw ba L3 L2 Joe Bs pS __ US Ap d z S e CZ cE WE E Ee SR F Soe Figure 2 1 2 1 AD DC Power Input Jumper J6 or J9 The board can accept DC or AC power input This can be with stripped wires connected to the screw terminal at J9 or the 2 1mm power connector J6 see Figure 2 1 The DC supply is not polarity sensitive since the board has a bridge rectifier on the input DC power is the preferred input type if available Note Do not exceed 32V supply input to the board You can measure the input voltage at TP1 and GND Pin 3 or 4 on J8 The power supply must able to source enough current to power the board and the XBee radio in TX mode This will typically be up to 5 00mA 0 5A for the higher powered XBee radios The input pre regulator on the board is an 80 switcher supplying 5V volts so your input supply needs to provide about 3 1W If you have a 12V supply then it should be rated at 250mA minimum Rev 1 00 3 8 19 2013 Wireless Current Sensor User Manual 2 2 AC DC Current Sensing J1 J3 amp J4 The circuit is designed to sense AC or DC currents More information will be supplied in the theory of operation section For now note that these three jumpers should all be in the same position as follows Pin 1 2 Select AC operation Pin 2 3 Select DC operation 2 3 Current Sense Terminal J5 This two position screw terminal is used to sense the current Notice that th
15. rrections or feedback about this manual please contact us at http bkp store com index php route information contact Rev 1 00 1 8 19 2013 Wireless Current Sensor User Manual 1 Introduction The Wireless Current sensor is designed to measure AD or DC currents up to 5 Amps at a maximum of 32V It is designed to sense positive or negative AC current levels or high low DC current levels and use the set points to trigger an XBee wireless module to send a notification 1 1 XB compatibility The Wireless Current Sensor can be used with XBee radio modules to allow remote communications and control Xbees are designed to use very little power except when the radios are transmitting data The board can be used with the following types of XBee amp XBeePro radios in Series 1 amp 2 footprints e DigiMesh 2 4G DigiMesh 900MHz 802 15 4 900MHz 868MHz Zigbee WiFi For best results we recommend that you use XBee radios with the RP SMA antenna connector or the mini whip antenna These will experience the least interference from the copper areas on the PCB The XBee radios with chip and PCB antennas will still work but their range may be reduced Note 1 XBee is a registered trademark of Digi International Inc Note 2 DigiMesh is a registered trademark of Digi International Inc Rev 1 00 2 8 19 2013 Wireless Current Sensor User Manual 2 Making Connections and Jumper Settings Refer to following PCB diagram for compone
16. uch that the decay is not too fast If it is too fast you will get a pulsing DC signal at the comparator pins which will cause the output to generate multiple triggers to the XBee radio Note that R5 and R19 10K Ohm are in the circuit to prevent short circuits if you reduce the trim pots to zero Ohms In most cases the decay trim pots can most likely be set at their maximum clockwise position Note that these are 10 turn pots CS amp C8 are 1 0uF 5 tolerance parts in 1206 packages They can be increased easily by soldering additional capacitors to them in parallel if you need longer decay times 3 5 An Example Let s say you want to trigger when AC current hits 2A Set your jumpers J1 J3 amp J4 to the AC position pins 1 2 At this point you know the nominal output of U4B will be 1 65 volts and the maximum swing is 3 185V That gives the following equation Vue 1 650V 2 3 185 1 650 5 gt 2 265V At that current the voltage at the sense pin 3 of U2A will be 2 265V minus the voltage across the diode in D1 about 0 15V_ or about 2 115V In order to provide some margin and make sure that the pulsed DC does not cause multiple triggers you might start with setting the voltage level at pin 2 of U2A to about 2 00 to 2 05V The voltage drop in Shottky diodes is very low at low currents Rev 1 00 6 8 19 2013 Wireless Current Sensor User Manual 4 Configuring the XBee Radio The examples shown here use an XBee 2 4
17. your network 2 Select a channel number that minimizes conflict with any Wi Fi networks you have There are docs on the web that show 802 15 4 channel assignments See the Digi manual for specifics on other networking options Rev 1 00 9 8 19 2013 Wireless Current Sensor User Manual 4 3 Configuring the Addressing XBee modules talk to each other using their serial numbers or a 16 bit addressing scheme We will show the 802 15 4 64 bit scheme here The Digi XBee manuals show you how to use short addresses COM4 X CTU Modem Parameter Profile Remote Configuration Versions PC Settings Range Test Terminal Modem Configuration r Modem Parameter and Firmware Parameter View r Profile Versions Read Write Restore Clear Screen Show Defaults D Always Update Firmware Save Download new ES versions Modem XBEE Function Set Version XB24 DM x XBEE DIGIMESH 2 4 x 8062 DI a Ey Addressing D 134200 SH Serial Number High D 40870885 SL Serial Number Low D 001344200 DH Destination Address High B 40883099 DL Destination Address Low BEER D J NI Node Identifier D 82 NT Node Discovery Backolf D 0 NO Node Discovery Options 50000 DD Device Type Identifier SY Security BH 0 EE Encryption Enable D KY AES Encryption Key SJ Serial Interfacing 3 8D Baud Rate B 0 NB Parity D 3 RO Packetization Timeout 1 07 DIO Configuration 0 D6
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